For training WaveRNN, you can find discussions on the config file here:
Like erogol said, I don’t think it’s an alternate vocoder either.
Also, config files and any/all implementation of neural networks are not implicitly connected. You could possibly change everything about it depending on how you implement the pipeline.
Regardless, if you’re looking for a vocoder, Erogol’s fork of wavernn should work well with mozilla TTS’s taco2.
Good luck!
P.S. I might be wrong about MelNet. Reading the paper atm.
Then i will try to research on pipline different between WaveRNN and MelNet. like you said that “You could possibly change everything about it depending on how you implement the pipeline.”